A new form of chemisorbed photo- and electro-active atomic H species on the TiO2(110) surface

Hydrogen adsorption on TiO2 is of importance in chemical and photochemical reduction processes. Using several surface science methods, we clearly distinguish two kinds of H species on the surface of rutile TiO2(110)-1 × 1. In contrast with the well-studied bridge-bonded OH species (α-H) originating from H2O dissociation on the surface oxygen vacancy site on TiO2(110), atomic H adsorption on the TiO2(110) (denoted as β-H) exhibits special high...